Product specifications:

Bluetooth Version: V4.2

Sound Mode: Stereo

Charging time: 3 Hours

Standby time:480 Hours

Talk/Playing time:48 hours

Operation distance:10 Meters

Connect 2 phones: Yes

Power Source: Built in Rechargeable Battery

Functions:

Volume up

Volume down

Playback/Previous

Lowe Battery Warning

Answer/End/Reject Call

Transfer call voice

Replay the phone

Mute

Default setting

Turn off voice notifications

Turn on voice notification